Tilt shaft for band mills



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G. E. CAMPBELL TILT SHAFT FOR BAND MILLS Filed March 3l vG. E. CAMPBELLTILT SHAFT FOR BAND MILLS Filed Maron 51 1922 4 sheets-sheet a Mwah 11i9241'o G. E. CAMPBELL TILT SHAFT FOR BAND MILLS Filed March 5l 1922 4Sheets-.Sheet 5 mmm/W Mah M 1924., 394%@632 G. E. CAMPBELL TILT SHAFTFOR BAND MILLS Filed March 3l 1922 4 Sheets-Sheet 4.

www? d `and the concentric sleeve-shaft 17.

.Patented Mar. 11, 1924.

tratar GEORGE E. CAMLPBELL, OF CHATTANOOG-A, TENNESSEE, ASSIGNO'R TO THEWHELAND COMPANY, OFCHATTANOOGI., TENNESSEE, A CORPORATION OF TENNESSEE.

TLT SHAFT FOR BAND MILLS.

Application led March 31. 1922.

'To aZ w/zofmy 'it may cof/mem.

Be it known that I, GEORGE E. CAMPBELL, a citizen of the United States,residing at Chattanooga, in the county of Hamilton and State ofTennessee, have invented certain new and useful Improvements in r1`iltShafts for Band Mills, of which the following is a specification.

This invention relates to an improvement in tilt shafts for band mills.

The object is to provide an arrangement for tilting the upper wheel of aband-mill, which is sometimes necessary in order to make the steel bandsaw run properly on the two wheels.

In the accompanying drawings:

Fig. 1 is a side elevation, partly in section;

Fig. 2 is an end view;

Fig. 3 is an enlarged detail;

Fig. 4 is a detail view of the ratchet. wheel and pawl;

Fig. 5 is a view of the worm casing and hand wheel;

Fig. G is a sectional view through the sleeves.

The numerals 1 and 2 represent the upper and lower saw wheels, and S isthe saw. The saw shafts are supported in bearings 3 at points above andbelow the base, and these bearings are carried in yokes 4 and The yokes4 are supported at the upper end of the sleeves 6, and these sleeves 6are slidable up and down in hollow columns 7, to which they are fitted.

These sleeves 6 may be raised and lowered in any convenient way, as for.instance through pins 8 secured in the bottoms of the sleeves. Thesepins are threaded through nuts 9, internally screw-threaded to'correspond to the threads on the pins to which are keyed gear-pinions10.

Vertical shafts 11 have gears 12 on their lower ends, which mesh withthe gear pinions 10. Bevel pinions 13 are keyed to their upper ends asshown in Fig. 3, and these. mesh with bevel pinions 14 and which arekeyed respectively to the shaft 1G The shaft 16 and sleeve 17 arerotatably mounted in Suitable bearings 16, Fig. 2` The sleeve 17 isspaced from the shaft 16 b v bushings 17 which permit the shaft andsleeve to turn independent of each other.

Likewise keyed to the shaft 16 is a worm- Seral No. 548,351.

wheel 18, and a worm-shaft 19 carried by the worm easing 20, keyed tothe sleeve 1T has its threads meshed with the threads of the worm-gear.On the worm is a handwheel 21, by which the worm-shaft 19, worm wheel1S, shaft 16, and gear 14 are turned in order to raise or lower one ofthe sleeves 6 and one side of the upperv saw wheel 1 in order to tiltthe wheel to malte the hand .saw run properly on the two wheels.

As a means for turning the shaft 16 and sleeve 1T with the gears 14 and15 thereon as a unit, a ratchet-wheel 22 is keyed to the shaft 16. andan operating lever 23 mounted thereon has a pawl 24 engaging the teethof the ratchet-toothed wheel 22 for impartiiu;A a step by step rotarymovement to the shaft and sleeve as a unit, when it is desired to raiseboth ends of the shaft or upper wheel uniformly. ln other words, byrevolvingl Lne shaft 1G through the ratchet mechanism, not only is theshaft itself turned, but also the sleeve. as the worm and worm-wheellock the sleeve and shaft together, all of which is necessary in orderthat the upper wheel may be lowered or raised exactly the same on bothsides when the saws are changed.

l claim:

l. Means for tiltingl a saw-shaft, including movable supports for theopposite ends thereof, horizontal concentric shafts connected with saidmovable supports, and means for turning; one or both of said shaftsv forraising' or loweringsaid movable sunA ports.

2. The comliination with a saw shaft and saw-wheel mounted thereon. ofmeans foi tiltingthe saw shaft, including' movable supports for theopposite ends thereof. con cent1-ir shafts geared to the movablesupports. and means for turning' either or both of said shafts.

3. The combination with a saw shaft and saw wheel mounted thereon, ofmeans for tilting' the saw shaft. inrlnding movable supports for theopposite ends thereof. courentrie shafts `geared to the movablesupports, and a worm and worm-wheel on neeteil to one of the shafts forraising or lovverinn one of the movable supports and tilting' thesmv-shaft and wheel.

4. The con'ibination with a saw shaft and saw wheel mounted thereon, ofmeans for tiltingT the sawy shaft. including movable supports for theopposite ends thereof`r con- Centric shafts geared to the movable supports, and a ratchet Wheel and pawl connested With one of the sha-fitsfor simultaneously raising 0r lowering both ends of the savv shaft andWheel.

5. The combination with a saw shaft and wheel mounted thereon, of meansfor tilting' the saw shaft including movable supports for the oppositeends thereof, pins oonnected with the movable supports and havingthreads thereon, nuts soreW-tlu'eaded on said pins, gears keyed to saidnuts, vertical shafts having gear-pinions meshing` with said gears andhaving bevel-gears on the ends thereof, concentric shaft and sleeve eachhaving bevel-gears meshing With the first-mentioned bevel-gears, and aworm and worm-Wheel Connected with the sleeve. for ,raising or loweringone of the movable sup ports and tilting the saw shaft and Wheel.

insens 6. The combination with a saw shaft and wheel mountedk thereon,of means for tilting the saw shaft including movable supports for theopposite ends thereof, pins elonneoted With the movable supports andhaving threads thereon, nuts screw-threaded on said pins, gears keyed tosaid nuts, vertical shafts having gear-pinions meshing' with said gearsand having bevel-gears on the ends thereof, a concentric shaft andsleeve, eaoh having' bevel gears meshing' with the first mentioned bevelgears, and means connected with the sleeve for raising or lowering oneof the movable supports for tilting the saw shaft and Wheel, and meansConnected With the sha-tt for simultaneously turning the shaft andsleeve `for raising or lowering the saw shaft and Wheel. .i

ln testimony whereotI l ailix inv signature.

GEORGE E. CAMPBELL.

